This volume summarizes the work of the XXIInd General Assembly. The discourses given during the inaugural and closing ceremonies are reproduced in Chapters I and III, respectively. The proceedings of the two sessions of the General Assembly will be found in Chapter II, which includes the resolutions and the report of the finance committee. The statutes, bye-laws and a few working rules of the Union are published in Chapter IV. The accounts and other aspects of the administration of the Union are recorded in Chapter V, together with the report of the executive committee for this last triennium, and provide the permanent record for the Union in the period 1991-1994. This volume also contains the Commission reports from The Hague compiled by the Presidents of the Commissions (Chapter VI). Finally, Chapter VII contains the list of countries adhering to the Union and the alphabetical, geographical and commission membership lists of about 8000 individual members.